@Yora@woelkchen most people do not look beyond the UI. Unfortunately writing a pretty UI is the easy part of writing a browser. Maintaining some browser engine is much harder.
So make sure to use a browser with an engine backed by as big an open source project as possible and one where the browser engine has as few downstream patches as possible.
Wrapping the entire engine in a new set of APIs not available upstream involves way too many downstream patches for my taste.